/Engine/Source/Editor/ContentBrowser/Public/AssetViewTypes.h
Get the value (and optionally also the type) of a custom column on this item
bool GetCustomColumnValue ( const [FName](API\Runtime\Core\UObject\FName) ColumnName, [FString](API\Runtime\Core\Containers\FString) & OutString, [UObject::FAssetRegistryTag::ETagType](API\Runtime\CoreUObject\UObject\UObject\FAssetRegistryTag\ETagType) * OutType ) const